org.apache.openjpa.jdbc.meta.strats
Class SuperclassDiscriminatorStrategy

java.lang.Object
  extended by org.apache.openjpa.jdbc.meta.strats.AbstractStrategy
      extended by org.apache.openjpa.jdbc.meta.strats.AbstractDiscriminatorStrategy
          extended by org.apache.openjpa.jdbc.meta.strats.SuperclassDiscriminatorStrategy
All Implemented Interfaces:
Serializable, DiscriminatorStrategy, Strategy

public class SuperclassDiscriminatorStrategy
extends AbstractDiscriminatorStrategy

Discriminator strategy that delegates to superclass discriminator.

Author:
Abe White
See Also:
Serialized Form

Field Summary
 
Fields inherited from class org.apache.openjpa.jdbc.meta.strats.AbstractDiscriminatorStrategy
disc, isFinal
 
Constructor Summary
SuperclassDiscriminatorStrategy()
           
 
Method Summary
 Class getClass(JDBCStore store, ClassMapping base, Result res)
          Return the class for the current result row.
 SQLBuffer getClassConditions(Select sel, Joins joins, ClassMapping base, boolean subclasses)
          Return SQL to limit the classes selected as much as possible to the given base class, and optionally its subclasses.
 boolean hasClassConditions(ClassMapping base, boolean subclasses)
          Whether any class conditions are necessary.
 void loadSubclasses(JDBCStore store)
          By default, logs a warning that this discriminator cannot calculate its list of subclasses on its own.
 void map(boolean adapt)
          Map the owning mapping using this strategy.
 
Methods inherited from class org.apache.openjpa.jdbc.meta.strats.AbstractDiscriminatorStrategy
select, setDiscriminator
 
Methods inherited from class org.apache.openjpa.jdbc.meta.strats.AbstractStrategy
customDelete, customInsert, customUpdate, delete, getAlias, initialize, insert, isCustomDelete, isCustomInsert, isCustomUpdate, update
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 
Methods inherited from interface org.apache.openjpa.jdbc.meta.Strategy
customDelete, customInsert, customUpdate, delete, getAlias, initialize, insert, isCustomDelete, isCustomInsert, isCustomUpdate, update
 

Constructor Detail

SuperclassDiscriminatorStrategy

public SuperclassDiscriminatorStrategy()
Method Detail

map

public void map(boolean adapt)
Description copied from interface: Strategy
Map the owning mapping using this strategy.

Specified by:
map in interface Strategy
Overrides:
map in class AbstractStrategy
Parameters:
adapt - if true, use the owning mapping's raw mapping info to set its ORM data; if false, ORM data will already be set

loadSubclasses

public void loadSubclasses(JDBCStore store)
                    throws SQLException,
                           ClassNotFoundException
Description copied from class: AbstractDiscriminatorStrategy
By default, logs a warning that this discriminator cannot calculate its list of subclasses on its own.

Specified by:
loadSubclasses in interface DiscriminatorStrategy
Overrides:
loadSubclasses in class AbstractDiscriminatorStrategy
Throws:
SQLException
ClassNotFoundException

getClass

public Class getClass(JDBCStore store,
                      ClassMapping base,
                      Result res)
               throws SQLException,
                      ClassNotFoundException
Description copied from interface: DiscriminatorStrategy
Return the class for the current result row.

Specified by:
getClass in interface DiscriminatorStrategy
Overrides:
getClass in class AbstractDiscriminatorStrategy
Throws:
SQLException
ClassNotFoundException

hasClassConditions

public boolean hasClassConditions(ClassMapping base,
                                  boolean subclasses)
Description copied from interface: DiscriminatorStrategy
Whether any class conditions are necessary.

Specified by:
hasClassConditions in interface DiscriminatorStrategy
Overrides:
hasClassConditions in class AbstractDiscriminatorStrategy
See Also:
DiscriminatorStrategy.getClassConditions(org.apache.openjpa.jdbc.sql.Select, org.apache.openjpa.jdbc.sql.Joins, org.apache.openjpa.jdbc.meta.ClassMapping, boolean)

getClassConditions

public SQLBuffer getClassConditions(Select sel,
                                    Joins joins,
                                    ClassMapping base,
                                    boolean subclasses)
Description copied from interface: DiscriminatorStrategy
Return SQL to limit the classes selected as much as possible to the given base class, and optionally its subclasses. The select and joins instances are supplied in order to get column aliases.

Specified by:
getClassConditions in interface DiscriminatorStrategy
Overrides:
getClassConditions in class AbstractDiscriminatorStrategy


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